package com.ny.demo527;

import java.sql.*;
import java.util.Scanner;

public class LoginDemo {
    private static final String URL = "jdbc:mysql://localhost:3306/userdb";
    private static final String username = "root";
    private static final String password = "123456";
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(URL, username, password);
        String sql = "select * from user where username = ? and password = ?";
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户名");
        String username = scanner.next();
        System.out.println("请输入密码");
        String password = scanner.next();
        preparedStatement.setString(1, username);
        preparedStatement.setString(2, password);
        ResultSet resultSet = preparedStatement.executeQuery();
        if (resultSet.next()) {
            System.out.println("登录成功");
        } else {
            System.out.println("登录失败");
        }
    }

}
